newclassd: the better class d amp?

[darkfenriz]

skål

[soongsc]

Properly impemented, the NCD is really fantastic. I have looked into the old NCD quite some time ago, and posted some impressions. However, after these years, I have discovered that if I had paid more attention to the input impedance characteristics which I have found to be cable dependent and cable length dependent, the listening impressions would have been greatly enhanced.
I had been wondering why those LDR based volume control enhances the performance to much since I had listened to one connected to the NCD. Through recent investigation going from speaker to amp in an active speaker project, I can almost be sure that the LDR based volume controls provide better impedance matching. I am also quite confident that the reason why different OP amps sound different while opinions vary, are also because of the input impedance characteristics and how it is interfaced with the other circuits.
In the last impressions posted, I was using a Hafler XL-280 amplifier that has some circuit at the input that assists in impedance problems. The NCD did not seem to have this, but this is good because the user can choose how to handle the input impedance issue based on his own cable.
Since I have tuned cables at hand, and also have some better speakers than the one originally used, I plan to go back and verify this pretty soon.